China National Chemical Corp (ChemChina), the nation’s largest chemicals manufacturer, is running a pilot programme at its plants in Tianjing that could recycle more than 80 per cent of the waste water that they generate by oil refining.
The company, which is trying to save energy and reduce emissions overall, says the recycling cost is two yuan (28 cents, 14p) a tonne, compared with water prices of 6.2 yuan a tonne.
This year the company, which is state-owned, expects to reduce energy consumption by seven per cent for every 10,000 yuan ($1418, £715) worth of production. Waste water discharges, chemical oxygen demand and sulphur dioxide emissions are forecast to fall by three per cent. Chemical oxygen demand is a measure of water pollution, and sulphur dioxide is a cause of acid rain.
ChemChina president Ren Jianxin said in December that the company had set a target of zero emissions and would invest 700million yuan this year in new technologies to adapt its plants.
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